/* 
 * Modern macOS Sonoma Theme for BSSG
 * Styled after macOS Sonoma aesthetics
 */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
        transform: none !important;
    }
    
    /* Disable all hover transforms */
    .site-title a:hover,
    .site-title a:focus,
    .hover-float:hover,
    .posts-list article:hover,
    .tags a:hover,
    .tags a:focus,
    .pagination a:hover,
    .pagination a:focus,
    .mac-button:hover,
    .featured-image:hover,
    .index-image:hover,
    .tag-image:hover,
    .archive-image:hover {
        transform: none !important;
    }
}

:root {
    /* macOS Sonoma color scheme */
    --bg-color: #f5f5f7;
    --window-bg: rgba(255, 255, 255, 0.8);
    --window-bg-solid: #ffffff;
    --text-color: #1d1d1f;
    --text-secondary: #6e6e73;
    --link-color: #0066cc;
    --link-hover: #0056b3;
    --header-color: #1d1d1f;
    --border-color: rgba(0, 0, 0, 0.1);
    --accent-color: #0071e3;
    --accent-secondary: #34c759;
    --code-bg: rgba(0, 0, 0, 0.05);
    --quote-bg: rgba(0, 0, 0, 0.03);
    --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    --frosted-blur: 20px;
    
    /* Site title gradient colors */
    --title-gradient-start: #007AFF;
    --title-gradient-end: #5AC8FA;
    
    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
    --font-headings: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    
    /* Sizing and spacing */
    --content-width: 840px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.25rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;
    --spacing-xxl: 3.5rem;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.2s ease;
}

/* Base elements */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--content-width);
    margin: var(--spacing-xl) auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--window-bg);
    box-shadow: var(--card-shadow);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    animation: fadeIn 0.3s ease-out;
}

/* Progressive enhancement for backdrop-filter */
@supports (backdrop-filter: blur(10px)) {
    .container {
        backdrop-filter: blur(10px); /* Reduced from 20px for better performance */
        -webkit-backdrop-filter: blur(10px);
    }
}

/* Disable backdrop-filter on mobile for better performance */
@media (max-width: 768px) {
    .container {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        background-color: var(--window-bg-solid); /* Use solid background on mobile */
    }
}

/* Header styling */
header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

/* macOS Sonoma style site title with gradient */
.site-title {
    font-family: var(--font-headings);
    font-weight: 700;
    color: var(--header-color);
    margin: 0;
    font-size: 2.25rem;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.site-title a {
    text-decoration: none;
    background: linear-gradient(110deg, 
        var(--title-gradient-start), 
        var(--title-gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    transition: all var(--transition);
    position: relative;
}

.site-title a:hover {
    text-decoration: none;
    transform: translateY(-1px);
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    background: linear-gradient(110deg, 
        var(--title-gradient-end), 
        var(--title-gradient-start));
    -webkit-background-clip: text;
    background-clip: text;
}

.site-title a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
    text-decoration: none;
    transform: translateY(-1px);
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    background: linear-gradient(110deg, 
        var(--title-gradient-end), 
        var(--title-gradient-start));
    -webkit-background-clip: text;
    background-clip: text;
}

/* Fallback for browsers that don't support background-clip */
@supports not (background-clip: text) {
    .site-title a {
        color: var(--accent-color);
    }
    
    .site-title a:hover {
        color: var(--link-hover);
    }
}

header h1 {
    font-family: var(--font-headings);
    font-weight: 700;
    color: var(--header-color);
    margin: 0;
    font-size: 2.25rem;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

header p {
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.5;
}

/* Navigation */
nav {
    margin: var(--spacing-md) 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: center;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition);
    position: relative;
    letter-spacing: -0.01em;
    padding: var(--spacing-xs) 0;
}

nav a::after {
    content: "";
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition);
}

nav a:hover {
    color: var(--accent-color);
}

nav a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    color: var(--accent-color);
}

nav a:hover::after,
nav a:focus::after,
nav a.active::after {
    width: 100%;
}

nav a.active {
    color: var(--accent-color);
    font-weight: 600;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    color: var(--header-color);
    line-height: 1.2;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.25rem;
    letter-spacing: -0.03em;
    margin-top: var(--spacing-xl);
}

h2 {
    font-size: 1.75rem;
    letter-spacing: -0.03em;
    margin-top: var(--spacing-xl);
}

h3 {
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    margin-top: var(--spacing-lg);
}

h4 {
    font-size: 1.2rem;
    letter-spacing: -0.01em;
    margin-top: var(--spacing-lg);
}

article h1 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

p {
    margin: 0 0 var(--spacing-md);
    line-height: 1.6;
    letter-spacing: -0.01em;
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    color: var(--link-hover);
    text-decoration: underline;
}

/* Buttons */
.mac-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    border-radius: 980px; /* Very large value for pill shape */
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    margin: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 0;
}

.mac-button:hover {
    background-color: var(--link-hover);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.mac-button.secondary {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-color);
}

.mac-button.secondary:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Article styling */
article {
    margin-bottom: var(--spacing-xxl);
    padding-bottom: var(--spacing-xxl);
    border-bottom: 1px solid var(--border-color);
    animation: fadeIn 0.4s ease-out forwards;
}

article:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

article .meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: var(--spacing-sm) 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.reading-time {
    font-size: 0.85rem;
    background-color: var(--code-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 980px;
    display: inline-flex;
    align-items: center;
}

/* Tags */
.tags {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tags a {
    display: inline-block;
    background-color: var(--code-bg);
    color: var(--text-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 980px;
    font-size: 0.85rem;
    text-decoration: none;
    transition: all var(--transition);
}

.tags a:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.tags a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    background-color: var(--border-color);
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0 var(--spacing-lg);
}

.tag-count {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-left: var(--spacing-xs);
}

/* Code blocks */
code {
    font-family: var(--font-mono);
    background-color: var(--code-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

pre {
    background-color: var(--code-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: var(--spacing-md) 0 var(--spacing-lg);
    border: 1px solid var(--border-color);
}

pre code {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    font-size: 0.9rem;
    display: block;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    display: block;
    margin: var(--spacing-lg) auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Footer */
footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: var(--spacing-md) 0 0;
    border-top: 1px solid var(--border-color);
}

/* Date header for index */
.date-header {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

/* Posts list */
.posts-list article {
    transition: transform var(--transition);
    padding: var(--spacing-md);
    border-radius: var(--radius);
    border: 1px solid transparent;
    margin-bottom: var(--spacing-lg);
}

.posts-list article:hover {
    transform: translateY(-2px);
    background-color: var(--bg-color);
    border-color: var(--border-color);
}

.posts-list h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
}

.posts-list h3 a {
    color: var(--header-color);
}

.posts-list h3 a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.summary {
    margin-top: var(--spacing-sm);
    color: var(--text-color);
    line-height: 1.5;
}

/* Blockquote styling */
blockquote {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--accent-color);
    background-color: var(--quote-bg);
    border-radius: var(--radius-sm);
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

th, td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: rgba(0, 0, 0, 0.02);
    font-weight: 600;
    color: var(--header-color);
}

tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.01);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

/* Selection styling */
::selection {
    background-color: var(--accent-color);
    color: white;
}

/* Responsive design */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
        margin: var(--spacing-md) var(--spacing-sm);
        border-radius: var(--radius-sm);
        width: auto;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    nav {
        gap: var(--spacing-sm);
        flex-direction: row;
        flex-wrap: wrap;
        margin-top: var(--spacing-sm);
    }
    
    article .meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    img {
        margin: var(--spacing-md) auto;
    }
}

/* macOS-style separator */
hr {
    border: none;
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-xl) 0;
}

/* Float animation for cards on hover */
.hover-float {
    transition: transform var(--transition), box-shadow var(--transition);
}

.hover-float:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
}

/* Pagination */
.pagination {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) 0 0;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.pagination a {
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pagination a:hover {
    background-color: var(--code-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.pagination a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    background-color: var(--code-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.pagination .page-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0 var(--spacing-sm);
}

.pagination .prev {
    margin-right: auto;
}

.pagination .next {
    margin-left: auto;
}

/* Custom scrollbar (Webkit only) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.03);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    transition: background var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Animation for page elements */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Media queries for dark mode if supported by browser */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --window-bg: rgba(30, 30, 30, 0.8);
        --window-bg-solid: #252525;
        --text-color: #f5f5f7;
        --text-secondary: #a1a1a6;
        --header-color: #ffffff;
        --border-color: rgba(255, 255, 255, 0.1);
        --code-bg: rgba(255, 255, 255, 0.05);
        --quote-bg: rgba(255, 255, 255, 0.03);
        --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }
    
    img {
        opacity: 0.9;
    }
    
    .mac-button.secondary {
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .mac-button.secondary:hover {
        background-color: rgba(255, 255, 255, 0.15);
    }
    
    code, pre {
        background-color: rgba(255, 255, 255, 0.05);
    }
    
    th {
        background-color: rgba(255, 255, 255, 0.05);
    }
    
    tr:nth-child(even) {
        background-color: rgba(255, 255, 255, 0.02);
    }
    
    tr:hover {
        background-color: rgba(255, 255, 255, 0.05);
    }
    
    ::-webkit-scrollbar-track {
        background: rgba(255, 255, 255, 0.05);
    }
    
    ::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.2);
    }
    
    ::-webkit-scrollbar-thumb:hover {
        background: rgba(255, 255, 255, 0.3);
    }
}

/* Touch device optimizations */
@media (hover: none) {
    .hover-float:hover {
        transform: none;
        box-shadow: var(--card-shadow);
    }
    
    .tags a:hover, 
    .pagination a:hover {
        transform: none;
    }
    
    .mac-button:hover {
        transform: none;
    }
}

/* macOS Sonoma style featured image card */
.featured-image {
    margin: var(--spacing-lg) 0 var(--spacing-xl);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    background-color: var(--window-bg-solid);
    transition: all var(--transition);
}

.featured-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.featured-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    transition: all var(--transition);
    margin: 0;
    border-radius: 0;
}

.featured-image .image-caption {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    background-color: var(--window-bg-solid);
    border-top: 1px solid var(--border-color);
    font-family: var(--font-main);
    line-height: 1.5;
    letter-spacing: -0.01em;
}

.index-image {
    margin: var(--spacing-lg) 0 var(--spacing-xl);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    background-color: var(--window-bg-solid);
    transition: all var(--transition);
}

.index-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.index-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    transition: all var(--transition);
    margin: 0;
    border-radius: 0;
}

.tag-image {
    margin: var(--spacing-lg) 0 var(--spacing-xl);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    background-color: var(--window-bg-solid);
    transition: all var(--transition);
}

.tag-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.tag-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    transition: all var(--transition);
    margin: 0;
    border-radius: 0;
}

.archive-image {
    margin: var(--spacing-lg) 0 var(--spacing-xl);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    background-color: var(--window-bg-solid);
    transition: all var(--transition);
}

.archive-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.archive-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    transition: all var(--transition);
    margin: 0;
    border-radius: 0;
}